Three new icons and fixes

[nkeor]

Icons added:

• Android Customization
• Modded Google Camera (to the appfilter, same icon as the original GCam)
• Humpback https://github.com/humpback-app/ and https://t.me/HumpbackApp

Fixed icons:

• Wallabagger

About Android Customization: I don't know whether it's the correct name. AOSiP uses this package name for the style editor, with the name Styles & Wallpapers. I'm not sure if other ROMs use it, but I did found something similar in Google's source: ThemePicker